Type-writing machine.



E. B. HESS.

TYPE WRITING MACHINE.

APPLICATION FILED AUG. 9. 19071 94:6,7?6 Patented Jan.18,1910.

WW IIIIIE UMBER 7/ gg WHEEL a, 1 I L/f/Ef/F UNITED STATES PATENTOFFIOE.

EDWARD B. HESS, OF NEW YORK, N. Y., ASSIGNOR TO ROYAL TYPEWRITER COMPANY,

OF HOIBOKEN, NEW JERSEY, A CORPORATION OF NEW JERSEY.

TYFE-WRITING MACHINE.

a To all whom it wai concern:

Be it known that I, EDWARD B. Hess, citizen of the United'States o siding in the boron h of Brooklyn, city and State of New Yor have invented certain Improvements in Type-Writing Machines, of which the following is a specifica on.

This invention relates to escapement devices of a typewritin machine.

to facilitate the fee and therefore afl'ord quickness of feed of the carriage, and to reduce the load upon the finger pieces of the type bar.

.In the accompanying drawings: Figure 1 is a front elevation: Fig. 2, a section on the line 2, 2, of Fig. 1: Fig. -3, a like view showing a slight modification: Fig. 4, a view, similar to Fig. 3, showmg a modification. p The escapement frame a 1s mounted to rock as usualand carries or is formed with the usual fast ldog b and has pivoted upon it a loose or limber dog 0 to'which is applied a coiled spring 0. The frame is to be rocked in the ordinary way from the universal bar. The dogs cooperate in the usual manner with the teeth 03 of the escape wheel d driven by the rack e. The fast or the loose dog, or both of them, is provided with a roller. That of the fast dog is marked 6 and that 0ft 16 limber dog is marked 0. These rollers are mounted to turn in recesses 7) 0 formed in the dogs at one corner thereof. Their axes are transverse to the axis of the escape wheel and their function is to facilitate the engagement of the dogs with, or disengagement from, the escape wheel and to thereby decrease the load on the: finger pieces of the type bars and to facilitate travel of the carriage. Thus, when the escapement frame is rocked to cause the fast dog to engage a tooth of the escape wheel, the roller 6 specification of Letters Patent.

Application filed August 8, 1907. Serial'No.

f America, re 1 Its obj ect- Patented Jan. .1s, 1e1o; 387,587.

I facilitate disengagement from thedog when the latter is moved in reverse direction.

Fig. 3 shows the rigid surface 0 of the loose dog engagedwith a tooth of the escape wheel to effect which engagement it has been i moved in a direction indicated by. the arrow i and during that movement the roller 0 has facilitated the travel of the dog. In like manner, the roller would" facilitate disengagement of thedog when moved in reverse direction.

In Fig. iboth. dogs are provided with such roller and with rigid surfaces 6", "0 on which the teeth of the escape wheel are to finally engage.

I have shown a rocking escapement; frame as that is the style of frame ordinarlyemployed but the invention is also applicable to a slidin or reciprocating frame.

It wi 1 be obvious to those skilled in the art that the feed of the carriage may beeffected during depressionof the finger, pieces orwhile they are returning to normal elevated position.

I claim:

1. An escapement mechanism for a typethe wheel .andcarrying fast and limber dogs each having a rigid surface to engage the teeth of the escape wheel and one of the dogs having aroller that is first to engage and last to disengage the teeth of the wheel.

An escapement mechanism fora type-' writing machine comprising an escape wheel, an escapement frame movable relatively to the wheel and carrying fast and limberdogs teeth of the escape wheel and one of therdo'gs having a roller that is. first toengage and laht to disengage theteeth-10f the wheel, the axis of said roller being transverse to the axis of the escape wheel.

3. An escapement mechanism for a typewriting machine comprising an escape Wheel, an escapement frame having fastand limber dogs movable relatively to the frame both said dogs having rigid surfaces to engage the teeth of the escape wheel and also rollers writing machine comprising an escape wheel, an escapement frame movable relatively. to"

each having a rigid surface to engage the.

for facilitating engagement and disengagement of the dogs with the teeth, the axis of 10 ment of the dogs with the teeth. said rollers being transverse to the axis of 4. An escapement mechanism for a typethe escape Wheel. Writing machine comprising an escape Wheel, In testimony whereof, I have hereunto an escapement frame having fast and limber subscribed my name.

dogs movable relatively to the frame both EDWARD B. HESS. said dogs having rigid surfaces to engage Witnesses: the teeth. of the escape Wheel and also rollers LILLIE F. BROWNING,

for facilitating engagement and disengage- RICHARD B. CAVANAGH. 

